[automerger skipped] DO NOT MERGE - Disallow deletion of channels with FGS notifications am: 8cb7e0a8 am: c3a36e58 -s ours am: edd6e60b -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13533155

Change-Id: I0413d24cb8a212abfedc0bd38b09929a692e7a05